redis-cli命令

-h <hostname>      Server hostname (default: 127.0.0.1).
-p           Server port (default: 6379).
-s         Server socket (overrides hostname and port).
-a       Password to use when connecting to the server.
-u            Server URI.
-r         Execute specified command N times.
-i       When -r is used, waits  seconds per command.
                   It is possible to specify sub-second times like -i 0.1.
-n             Database number.
-x                 Read last argument from STDIN.
-d      Multi-bulk delimiter in for raw formatting (default: \n).
-c                 Enable cluster mode (follow -ASK and -MOVED redirections).
--raw              Use raw formatting for replies (default when STDOUT is not a tty).
--no-raw           Force formatted output even when STDOUT is not a tty.
--csv              Output in CSV format.
--stat             Print rolling stats about server: mem, clients, ...
--latency          Enter a special mode continuously sampling latency.
                   If you use this mode in an interactive session it runs
                   forever displaying real-time stats. Otherwise if --raw or
                   --csv is specified, or if you redirect the output to a non
                   TTY, it samples the latency for 1 second (you can use
                   -i to change the interval), then produces a single output
                   and exits.
--latency-history  Like --latency but tracking latency changes over time.
                   Default time interval is 15 sec. Change it using -i.
--latency-dist     Shows latency as a spectrum, requires xterm 256 colors.
                   Default time interval is 1 sec. Change it using -i.
--lru-test   Simulate a cache workload with an 80-20 distribution.
--replica          Simulate a replica showing commands received from the master.
--rdb    Transfer an RDB dump from remote server to local file.
--pipe             Transfer raw Redis protocol from stdin to server.
--pipe-timeout  In --pipe mode, abort with error if after sending all data.
                   no reply is received within  seconds. Default timeout: 30. Use 0 to wait forever.
--bigkeys          Sample Redis keys looking for big keys.
--hotkeys          Sample Redis keys looking for hot keys. only works when maxmemory-policy is *lfu.
--scan             List all keys using the SCAN command.
--pattern     Useful with --scan to specify a SCAN pattern.
--intrinsic-latency  Run a test to measure intrinsic system latency.
                   The test will run for the specified amount of seconds.
--eval <file>      Send an EVAL command using the Lua script at <file>.
--ldb              Used with --eval enable the Redis Lua debugger.
--ldb-sync-mode    Like --ldb but uses the synchronous Lua debugger, in
                   this mode the server is blocked and script changes are
                   not rolled back from the server memory.
--cluster  [args...] [opts...] Cluster Manager command and arguments (see below).
--verbose          Verbose mode.
--no-auth-warning  Don't show warning message when using password on command line interface.

* 注意有的参数是1条杠“-”，有的是2条杠“--”，初学时容易输错杠以为输错参数

其中，--stat参数常用于性能调优，以下是其返回结果的属性说明：

keys         key的数量
mem          键值对的总内存量
clients      当前连接的总clients数量
blocked      当前阻塞的客户端数量
requests     服务器请求总次数 (+1) 截止上次请求增加次数
connections  服务器连接次数

参考资料：

https://redis.io/topics/rediscli